Polysciences, Inc. Announces A New Cationic Polymer - Polyethylenimine “Max”

Warrington, PA – August 2007 - Polysciences, Inc., a leading manufacturer of specialty monomers, polymers and laboratory chemicals, announces the release of Polyethylenimine “Max” (nominally MW 40,000), a high potency, and nearly fully hydrolyzed linear polyethylenimine with longer contiguous ethylenimine segments. “Polyethylenimine “Max” is built from the same polymer backbone as our popular linear material, polyethylenimine (MW 25,000). Our new Polyethylenimine “Max” material is supplied as a hydrochloride salt, which substantially adds to the overall weight of the polymer units. The hydrochloride salt form is easier to handle and may be converted into the free amine form by neutralization with base,“ according to Robert Gleim, Ph.D., Catalog Business Development Manager, Polysciences, Inc.

Despite the fact N-deacylation reactions are notoriously difficult, new Polyethylenimine “Max” is believed to contain more than 11% additional free (protonatable) nitrogen than our original linear polyethylenimine. Estimates of the average number of repeating ethylenimine units ranges to around 581 segment, resulting in dramatically increased lengths of protonatable nitrogen.

Visit www.polysciences.com to learn more about Polysciences, Inc. products and all our monomer, polymer and specialty chemicals for use in pharmaceutical and industrial applications.

About Polysciences, Inc.

Headquartered in Warrington, PA, Polysciences, Inc. is a leading manufacturer of laboratory supplies and specialty monomers/polymers for microscopy, histology, biotechnology, electronics, and other industrial applications. Although Polysciences offers a full line of off-the-shelf products for the medical, life sciences, and research community, our specialty is developing custom synthesized monomers and polymers for customer specific needs. Polysciences, Inc. is also a producer of custom adhesives and chemicals for the electronics industry. Polysciences has more than a 40-year history of successful partnerships with industry in developing new materials for emerging applications. Polysciences maintains facilities in Warrington, PA and Eppelheim, Germany in addition to the Fishers, IN facility of its wholly owned subsidiary Bangs Labs, Inc.

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